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A matrix with the same number of rows and columns is called
ARow matrix
BColumn matrix
CIdentity matrix
DSquare matrix
Answer & Solution
Correct answer: D. Square matrix
1. A matrix of order m × n is square when m = n.
2. Row matrix has 1 row; column matrix has 1 column; identity is a special square matrix with 1s on diagonal.
3. Square matrices are necessary for determinants and inverses.
4. Hence (C) is correct.
_Source: Maharashtra Balbharati Std XII Mathematics & Statistics (Commerce), Ch 1 "Matrices", §1.1 ¶§1.1_
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