Which one of the following has the shortest access time?

MOSFETs are slower than BJTs because of enormous capacitances at their junctions, formed by metal, substrate and the oxide layer.

Due to the high value of capacitances time constant(T=RC) of MOSFET is high and has a lower switching speed in comparison to BJT. Hence Bipolar static RAM will have the shortest access time.

NOTE-

We Generally use MOSFETs in digital circuits because of their low power to switch( gate current = 0 almost), lesser static power dissipation, ease of fabrication, thermal stability, and less leakage (only the majority of carriers form the current in MOSFET).