TS EAMCET Medical 2016 Paper

Find the correct pair of statements
(I) The influx of Cl− into guard cells during stomatal opening is active
(II) The entry of sucrose from companion cells into sieve tubes at source involves expenditure of energy
(III) At the sink, sucrose moves out of the phloem sap by passive transport
(IV) The efflux of K+ from guard cells during stomatal closure does not involve energy expenditure