The correct answer is (b) 1/6 + Residue.
Under Muslim Law, the share of the father in inheritance is 1/6 if there is no son or son’s son. However, if there are one or more daughters, son’s daughters, and no son or son’s son, the father’s share is 1/6 + Residue. This means that the father will receive 1/6 of the estate, plus any remaining assets after the other heirs have received their shares.
The other options are incorrect because they do not reflect the correct share of the father in inheritance under Muslim Law. Option (a) states that the father’s share is 1/6 only. This is incorrect because the father’s share is 1/6 + Residue if there are one or more daughters, son’s daughters, and no son or son’s son. Option (c) states that the father’s share is Residue. This is incorrect because the father’s share is 1/6 + Residue if there are one or more daughters, son’s daughters, and no son or son’s son. Option (d) states that the father is excluded from any right. This is incorrect because the father has a right to inherit under Muslim Law.