According to G. T. Trewartha, the area of Am type climate in India is

Concept

Trewartha's scheme modifies Köppen's climatic classification and distinguishes tropical climates by temperature and the amount and seasonal distribution of rainfall. In this scheme, Am denotes a tropical monsoon or tropical rainy climate: temperatures remain high, annual rainfall is very heavy, and the dry season is short.

Application

In the Indian application of Trewartha's scheme, the Am region is identified with the Western Ghats or Sahyadri belt; the classification also places Tripura and southern Assam in this climatic region. Among the geographical areas offered here, Western Ghats is therefore the specified area.

Contrast

• Meghalaya plateau is a plateau region of northeastern India; it is not the exact northeastern area named in the cited classification.

• Coromandel coastal region lies on the southeastern coast and has a different seasonal rainfall regime.

• More than one of the above would require at least two of the listed geographical areas to fit the cited classification.

• None of the above would require every listed geographical area to fall outside the cited classification.

Result

The required area is the Western Ghats.