Deficiency of which of the following can casue yellowing of intravenous regions of leaves?

Deficiency of which of the following can cause yellowing of intravenous region of leaves?

Deficiency of which of the following can cause urea accumulation.

Deficiency of which of the following can cause urea accumulation.

Deficiency of which of the following element casue weaking of pedicel and petiole Or Which of the following is required for binding protein wit nucleic acid

Which of the following disease is casued by virus ?

Which of the following disease is casued by virus ?

Which of the following disease is casued by virus ?

Which of the following disease is casued by virus ?

Excess of which of the following hormones casues Cushing's syndrome?