A lawyer tells a male client that blood type cannot be used to his advantage in a paternity suit aga

Question

A lawyer tells a male client that blood type cannot be used to his advantage in a paternity suit against the client because the child blood, in fact, be the client's, according to blood type. Which of the following is the only possible combination supporting this?

(Answers in order: mother : father : child)

Accepted Answer

Sol.(a) [Key Concept: ABO Blood Groups — Paternity Analysis] Option (a): Mother A × Father B → Can the child be O? If mother is I^A i and father is I^B i, offspring can be I^A I^B (AB), I^A i (A), I^B i (B), or ii (O). YES — an O child is possible. This means the father cannot be excluded by blood type. Option (c): AB × A cannot produce O (AB parent always contributes I^A or I^B). Therefore, option (a) is the correct combination.

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