Correct option is B
· A. True: 'Pusa Nanha' is a dwarf mutant cultivar of papaya.
· B. True: 'Pusa Early Dwarf' is a variety of strawberry.
· C. True: 'Nendan' and 'Rasthali' are banana varieties.
· D. True: 'Durgapur Meetha' and 'Durgapur Kesar' are improved varieties of watermelon.
· E. False: 'Rose Supreme' and 'Happy End' are not varieties of chrysanthemum.
Thus, the correct answer includes A, B, C, D only.