Correct option is C
Assertion 'A' states that when a holding company holds more than 50% (but not the whole) shares of a company, the holders of the remaining shares will be known as "Minority." This statement is true.
Reason 'R' states that minority interest is calculated by considering proportionate shares and reserves of the holding company. However, this statement is false. Minority interest refers to the ownership or equity interest in a subsidiary company that is not owned by the parent company or the majority shareholder. It is not calculated based on the proportionate shares and reserves of the holding company.
Therefore, option (c) is the correct answer: A is true but R is false.