Correct option (d) data inadequate
Explanation:
From the above question, it is clear that S is the mother of R (not confirmed R is either male or female). On the other hand N is the daughter of R and sister of M (whose sex is also not known). If R is malk then M will be grand daughter/son of S in case of R is female than M will be maternal daughter/son of S. Hence, as per the options data is inadiquate.