Biology · PYQ NEET UG 2016(2)

A few drops of sap were collected by cutting across a plant stem by a suitable method. The sap was tested chemically. Which one of the following test results indicates that it is phloem sap?

1. A
   Acidic
2. B
   Alkaline
3. C
   Low refractive index
4. D
   Absence of sugar