Pollen grains can be stored for several years in liquid nitrogen having a temperature of Option 1 : -120°COption 2 : -160°COption 3 : -80°COption 4 : -196°C

Option 1 :ZygotenOption 2 : PachyteneOption 3 : DiploteneOption 4 : Diakinesis Correct answer is Option 3.