Which of the following is true?
a) Every trapezium is a parallelogram.
b) Every parallelogram is a square.
c) Every rectangle is a square.
d)Every square is a rhombus.
Aonly c
Bonly a
Conly d
Dboth a and b
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x²/25 + y²/16 = 1 എന്ന എലിപ്സിന്റെ ലക്ട്സ് റെക്ടത്തിന്റെ നീളം കണ്ടെത്തുക