Question : When milk is converted into curd, which type of change is it?

Option 1: Reversible change

Option 2: Physical change

Option 3: Isothermal change

Option 4: Chemical change

Question : Directions: Five professors A, B, C, D, and E are sitting in a row facing the North (not necessarily in the same order). A is second to the left of D. Only two professors are sitting between C and E. No professor is sitting to the right of E. How many professors are sitting to the left of D?

Option 1: 3

Option 2: 0

Option 3: 2

Option 4: 1