The human male ejaculates (i) about 20 to 30 million sperms during a coitus of which, (ii) for normal fertility, at least 40 per cent sperms must have normal shape and size and (iii) for normal fertility, at least 50 per cent of them must show vigorous motility. Regarding (i), (ii) and (iii) :

Question

( a ) (iii) is incorrect; (i) and (ii) are correct
( b ) All are incorrect
( c ) (ii) is incorrect; (i) and (iii) are correct
( d ) (i) is correct; (ii) and (iii) are incorrect