Assinale a opção que apresenta a distância correta entre os planos straight pi subscript 1 colon space straight x plus straight y minus straight z plus 2 equals 0 space straight e space straight pi subscript 2 colon space straight x plus 2 straight y minus straight z minus 1 equals 0

a.
d open parentheses straight pi subscript 1 comma straight pi subscript 2 close parentheses equals 1

b.
d open parentheses straight pi subscript 1 comma straight pi subscript 2 close parentheses equals square root of 2

c.
d open parentheses straight pi subscript 1 comma straight pi subscript 2 close parentheses equals 0

d.
d open parentheses straight pi subscript 1 comma straight pi subscript 2 close parentheses equals fraction numerator square root of 2 over denominator 2 end fraction

e.
d open parentheses straight pi subscript 1 comma straight pi subscript 2 close parentheses equals square root of 6