Short/intense flame is produced during combustion of gaseous fuel by
using
(A) High amount/current of combustion air
(B) Low amount/current of combustion air
(C) Preheated secondary air
(D) Very little excess air
using
(A) High amount/current of combustion air
(B) Low amount/current of combustion air
(C) Preheated secondary air
(D) Very little excess air