Does sodium borohydride reduce C=N group?

Q.15 the major product of the following reaction is:

I have read that $$\ce{NaBH4}$$ reduces only aldehyde, ketone and acid chlorides. In some cases it may reduce double bonds conjugated with carbonyl groups. So shouldn't the answer here be option 1?

• Sodium borohydride readily reduces isolated C=N bonds, read up on reductive amination. – Waylander Jan 16 '19 at 8:28
• @Waylander Can you provide some reference in the literature? – Soham Jan 16 '19 at 9:49
• – Waylander Jan 16 '19 at 10:02

Waylander's comments answer the title question as well as I could. Sodium borohydride, and even modified versions where some of the hydride ligands are replaced by others like $$\ce{NaBH3CN}$$, can reduce imines.
• The examination commitee has decided that 4 is correct and decided to penalize option 1 . However they are ready to get their answers challenged if proper citations are provided. Please help me if you think that $1$ should not be penalized for the question written with no other specific details. Please sir. (This question is from an undergraduate entrance examination for high school students) – Soham Jan 16 '19 at 13:35