Two major differences between biprism and Lloyd’s mirror fringes are:

(i) in the biprism fringe pattern the central fringe is bright while Lloy’s mirror is dark
(ii) the conditions for constructive and distructive interference in Lloyd’s mirror are opposite to that in biprism.
(a) both statement are true
(b) both statement are wrong
(c) statement (i) is true but not (ii)
(d) statement (i) is wrong but (ii) is true