Sumitra Mahajan is associated with the post of as on June 2014

The correct answer is Lok Sabha Speaker.

Key PointsSpeaker of Lok Sabha
Election and Tenure :

• The Speaker is elected by the Lok Sabha from amongst its members (as soon as may be, after its first sitting).
• The date of election of the Speaker is fixed by the President.
• Usually, the Speaker remains in office during the life of the Lok Sabha.
• However, he has to vacate his office earlier in any of the following three cases:

1. if he ceases to be a member of the Lok Sabha;
2. if he resigns by writing to the Deputy Speaker; and
3. if he is removed by a resolution passed by a majority of all the members of the Lok Sabha. Such a resolution can be moved only after giving 14 days’ advance notice.

•  The Speaker does not vacate his office and continues till the newly-elected Lok Sabha meets.
• He decides whether a bill is a money bill or not and his decision on this question is final.

Additional Information

Deputy Speaker of Lok Sabha: 

• The Deputy Speaker is also elected by the Lok Sabha itself from among its members.
• He is elected after the election of the Speaker has taken place. The date of election of the Deputy Speaker is fixed by the Speaker. 
• Like the Speaker, the Deputy Speaker remains in the office usually during the life of the Lok Sabha.
• He may vacate his office earlier in any of the following three cases:
  1. if he ceases to be a member of the Lok Sabha;
  2. if he resigns by writing to the Speaker; and
  3. if he is removed by a resolution passed by a majority of all the members of the Lok Sabha. Such a resolution can be moved only after giving 14 days’ advance notice.
• The Deputy Speaker performs the duties of the Speaker’s office when it is vacant. 
• The Deputy Speaker is not subordinate to the Speaker. He is directly responsible to the House.

Chairman of Rajya Sabha

• The presiding officer of the Rajya Sabha is known as the Chairman.
• The vice-president of India is the ex-officio Chairman of the Rajya Sabha.
• During any period when the Vice-President acts as President or discharges the functions of the President, he does not perform the duties of the office of the Chairman of Rajya Sabha.
• The Chairman of the Rajya Sabha can be removed from his office only if he is removed from the office of the Vice-President.
• As a presiding officer, the powers and functions of the Chairman in the Rajya Sabha are similar to those of the Speaker in the Lok Sabha.
• Unlike the Speaker (who is a member of the House), the Chairman is not a member of the House. 
• The Vice-President cannot preside over a sitting of the Rajya Sabha as its Chairman when a resolution for his removal is under consideration.