A female Anopheles mosquito can be recognised as its
Palps- Each of a pair of elongated segmented appendages near the mouth of an arthropod, usually concerned with the senses of touch and taste.
Proboscis - (in many insects) an elongated sucking mouthpart that is typically tubular and flexible.
Anopheles mosquitoes can be distinguished from other mosquitoes by the palps, which are as long as the proboscis, and by the presence of discrete blocks of black and white scales on the wings.
So, the correct answer is ‘Proboscis and palpi are long and more or less of equal length’.