Consider the following statements and choose the correct answer:<br>1. Sieve cells are present in all groups of plants<br>2. Transverse position of end walls of sieve tubes is a primitive feature whereas their oblique or inclined position is an advanced condition<br>3. Restriction of sieve areas on the end wall is a primitive condition whereas their presence on end wall as well as radial wall is an advanced condition<br>4. The sieve plates with larger sieve pores are advanced

Correct Answer: Only 4 is true