What is the correct scientific name for Mango, including the author citation?

The question asks to select the correct scientific name for Mango, Mangifera indica, as first expressed by Carolus Linnaeus. This implies that the author citation should be included.

• The scientific name consists of two parts: the genus name and the species epithet.
• The genus name starts with a capital letter, and the species epithet starts with a small letter.
• Both parts are italicized when typed or underlined separately when handwritten.
• The name of the author who first described the species is often appended to the scientific name, usually in an abbreviated form, and is not italicized. Carolus Linnaeus is abbreviated as 'Linn.' or 'L.'.

• (a) Mangifera Indica: The species epithet 'Indica' is capitalized, which is incorrect.
• (b) Mangifera indica Car. Linn.: 'Car.' is not the standard abbreviation for Linnaeus.
• (c) Mangifera indica Linn.: This option correctly capitalizes the genus, uses a lowercase species epithet, and includes the correct abbreviation for Linnaeus ('Linn.') without italicizing it. This is the standard way to cite the author.
• (d) Mangifera indica: This is the correct scientific name but lacks the author citation, which is implied by "as first expressed by Carolus Linnaeus."

Based on the rules of binomial nomenclature and the requirement to include the author citation, option (c) is the most accurate.

The correct answer is c).

• Mangifera indica Linn.

The correct scientific name for Mango, including the author citation by Carolus Linnaeus, is Mangifera indica Linn.

The final answer is $\boxed{\text{c) Mangifera indica Linn.}}$