Complete dominance is absent in

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(B) Incomplete dominance is a phenomenon where the dominant allele does not completely mask the effect of the recessive allele, resulting in an interm

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Mirabilis jalapa

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(B) Incomplete dominance is a phenomenon where the dominant allele does not completely mask the effect of the recessive allele, resulting in an intermediate phenotype in the heterozygote.$Mirabilis 	ext{ } jalapa$ (Four o'clock plant) is a classic example of incomplete dominance, where crossing red-flowered plants with white-flowered plants produces pink-flowered offspring in the $F_1$ generation.$Pisum 	ext{ } sativum$ exhibits complete dominance.Therefore, the correct option is $(b)$.

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