Explanation:

Let's break this family puzzle down:

- A is the engineer, married to the lady stenographer.

- The judge is married to the lawyer.

- F is the draughtsman. F is son of B and brother of E.

- C is the lawyer and is D's daughter-in-law. So C is married to D’s son.

- E is an unmarried doctor.

- D is grandmother of F — so D is a woman, and not married to A (the engineer).

- Two married couples total.

Now, let's map them:

- D (grandmother), married to ?

- C (lawyer), married to D’s son (who is the judge).

- F is B’s son and E’s brother.

- E is unmarried doctor.

- So, B is D’s child; B is either D’s son (judge) or daughter (stenographer).

With all links, the diagram looks like:

- D (grandma)

- Married to (probably deceased, or not mentioned)

- Has children: B (the judge, male) and A (the engineer, male).

- B (judge, male), married to C (lawyer, female).

- F (draughtsman) and E (doctor) are B and C’s children.

- A (engineer) married to the lady stenographer, who must be D’s daughter-in-law.

But, it says A is married to lady stenographer—A and the lady stenographer are a couple, and the judge and lawyer are a separate couple (that’s B and C).

Therefore:

- D is grandmother but is not a couple to anyone named here.

- The jobs left: D is only left with stenographer or judge, but the lady stenographer is married to A, and D is not married to A.

D doesn’t fit any remaining job *except* for judge, as everyone else’s profession is accounted for.

So, here's the thing:

- D is the judge.

Correct Option:

- Option 1: Judge

And here's a summary of the professions:

- A: Engineer (married to lady stenographer, not D)

- B: Judge (male, married to lawyer C)

- C: Lawyer (female, married to judge B)

- D: Stenographer (grandmother, so not possible; already assigned)

- E: Doctor (unmarried)

- F: Draughtsman (son of B and brother to E)

So D must be judge, by process of elimination.