Fibres passing through crus-cerebri are -: (A) Corticonuclear and cortricospinal fibres, (B) Medial lemniscus, (C) Spinothalamic, (D) All
Answer is A. Crus cerebri contains : 

Middle two-third is occupied by corticospinal and corticobulbar (corticonuclear) fibers. 
Medial one-sixth is traversed by fronto-pontine fibers; and 
lateral one sixth contains temporopontine, parietopontine and occipitopontine fibers.