Given:

1. Blood cells
2. Bone cells
3. Hair strands
4. Saliva

Samples taken for DNA testing in criminal investigation can be

A) 1, 2 and 3 only

B) 1 and 4 only

C) 2 and 3 only

D) 1, 2, 3 and 4

This MCQ is part of the UP PSC Previous Year Questions (PYQs) series, focusing on UPPSC Prelims 2008 (GS Paper I)