A) 3
B) 1
C) 2
D) Can't say
E) None of these
Correct Answer: D
Solution :
Explanation Option [d] is correct because there is no sign of \['+'\] or \['-'\] for R. Therefore, R's gender is not known. Rest of the options is incorrect because of the correctness of option [d].You need to login to perform this action.
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