MCQ
Which of the following is a nucleoside?
- AAdenosine, Adenylic acid, Cytosine
- ✓Adenosine, Guanosine, Cytidine
- CCytidylic acid, adenosine, Adenylic acid
- DGuanylic acid, Cytosine, Adnosine
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$A.$ Periodic abstinence
$B.$ Withdrawal
$C.$ Coitus interruptus
$D.$ Lactational amenorrhoea
Reason : Sex in humans is a polygenic trait depending upon a cumulative effect of some genes on $X-$ chromosome and some on $Y-$ chromosome.