Design of Masonry Structures
Cement mortars richer than 1 : 3 are not used in masonry because(i) There is no gain in strength of masonry(ii) There is high shrinkage(iii) They are prone to segregation

(ii) and (iii) are correct
(i) and (ii) are correct
(i), (ii) and (iii) are correct
Only (ii) is correct

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Design of Masonry Structures
Assertion A : Lime based mortars give higher ratio of brickwork strength to mortar strength as compared to non-lime mortar.Reason R : Lime based mortars have lower bond strength as compared to non-lime mortars.Select your answer according to the codes given below:

Both A and R is true and R is the correct explanation of A
A is true but R is false
Both A and R is true but R is not the correct explanation of A
A is false but R is true

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