At present, the lentils of _________ are widely used to span the openings for doors, windows, etc. in a structure.
(a) Timber
(b) Wood
(c) RCC
(d) Cement
This question was posed to me at a job interview.
My question is based upon Materials for Lintels in portion Arches, Lintels, Stairs and Formwork of Construction & Building Materials