(1) If the gross total income of an assessee includes any profits and gains derived from the business of collecting and processing or treating of bio-degradable waste for, —

(a) generating power; or

(b) producing bio-fertilizers, bio-pesticides or other biological agents; or

(c) producing bio-gas; or

(d) making pellets or briquettes for fuel or organic manure, there shall be allowed a deduction equal to the whole amount of such profits and gains for five consecutive tax years, beginning with the tax year in which such business commences.