Which of the following practices can help in water conservation in agriculture? ‎
‎1. Reduced or zero tillage of the land ‎
2. Applying gypsum before irrigating the field ‎
‎3. Allowing crop residue to remain in the field ‎

Select the correct answer using the code given below : ‎
(a) 1 and 2 only
‎(b) 3 only
‎(c) 1 and 3 only
‎(d) 1, 2 and 3