What is the profession of B ?

• Identify the two married couples: Couple 1 is A (Engineer) and the lady Stenographer; Couple 2 is the Judge and the Lawyer.

• Determine the gender and role of C: C is the Lawyer and is the daughter-in-law of D, so C is female and married to the Judge.

• Determine the identity of the Judge: Since C (Lawyer) is married to the Judge, and the only other male in the family besides A is B (as F is the son of B and E is the unmarried doctor, implying E is likely female or the remaining male, but let's look at family structure), we must place the males. Males are A, B, F. Females are C, D, E (or one of B/E is female? No, F is son of B, so B is parent. E is brother of F, so E is male. Thus Males: A, B, E, F. Females: C, D, and the Stenographer).

• Re-evaluate genders: A (M, Engineer), B (M, Parent of F), C (F, Lawyer), D (F, Grandmother), E (M, Doctor, Brother of F), F (M, Draughtsman). The remaining profession is Stenographer, which must be held by a female. The females are C, D, and one more? Wait, there are 6 people. A, B, C, D, E, F. Males: A, B, E, F. Females: C, D. Who is the 6th? The prompt says 'A, B, C, D, E, F'. Let's check professions: Engineer (A), Stenographer (Lady), Doctor (E), Draughtsman (F), Lawyer (C), Judge (B).

• Since C is the Lawyer and is married to the Judge, and C is the daughter-in-law of D, the Judge must be C's husband. The available males are A, B, E, F. A is married to the Stenographer. E is unmarried. F is the son of B. Therefore, the Judge must be B.

• Thus, B is the Judge.