Explanation:

Article 16 deals with the equality of opportunity in matters of public employment. Equal opportunity is a term which has differing definitions and there is no consensus as to the precise meaning. 

• Thus the guarantee in clause (1) will cover the (a) initial appointments, (b) Promotions, (c) Termination of employment, (d) Matters relating to the salary, periodical increments, leave, gratuity, pension, Age of superannuation etc.

Hence option 4th is correct.