plz explain all the options

plz explain all the options Sclerenchyma are abseni (1 ) Protoxy\em (3) Metaxy\em ash Educational Services - Reqd. office

The first formed primary xylem is called protoxylem and the later formed xylem is called metaxylem.

The first formed primary phloem consists of narrow sieve tubes and is referred to as protophloem and the later formed phloem has bigger sieve tubes and is referred to as metaphloem.

The sclerenchyma fibres are generally absent in primary xylem (protoxylem) and primary phloem (protophloem).

Hence, option (4) is correct.