If a : b = c : d, thenma + nc is not equal tomb + nd

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If a : b = c : d, then ma + nc is not equal to
mb + nd

1. a
  b
2. c
  d
3. a + c
  b + d
4. c − a
  b − d

Correct Option: C

a : b = c : d

⇒	a	=	c	=	ma	=	nc
	b		d		mb		nd

⇒	a + c	=	ma + nc
	b + d		mb + nd