(a) whether the excise duty is levied on coal mines and despatched
from the collieries in the country;
(b) if so, the amount of revenue collected from these mines during the
last three years;
(c) the number of coal mines working illegally in the country;
(d) whether any assessment has been made about the evasion of tax by them;
and
(e) if so, the action taken by the Government to recover tax from them?