Answer:b
Explanation:
Given
Implicit cost=$ 200,000
Explicit cost=$ 1 million
4000 units
Output=$ 300 per unit
therefore revenue 
as we need to compute accounting profit therefore we do not consider the implicit cost
accounting Profit=1.2-1=$ 0.2 million
and economic Profit =Revenue -explicit cost-Implicit cost
economic Profit=0.2-0.2=0
Thus option b is most appropriate
Aniline is a primary aromatic amine.
In organic chemistry, amines are compounds and functional groups containing a basic nitrogen atom with a lone pair of electrons. Amines are formally derivatives of ammonia, in which one or more hydrogen atoms have been replaced with substituents such as alkyl or aryl groups.
They are widely used in the development of chemicals for crop protection, pharmaceuticals and water purification. It is also used in personal care products. Ethanolamine is the most commonly used type of amine on the global market.
All derived from a class of basic organic compounds derived from ammonia by replacing hydrogen with one or more monovalent hydrocarbon radicals
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