Which of the folowing is not correct?

Which of the folowing is/are correct when a nuclide of mass number (A) and atomic number (Z) undergoes radioactive process?

A lift is coming form 8th floor and is just about to reach 4th floor. Taking ground floor as origin and positive direction upwards for all quantities, which one of the folowing is correct?

Which of the folowing is not an endothermic reaction

Which of the folowing is not a function of vertebral column ?

Which of the folowing is not a function of vertebral column ?

Which of the folowing is not true about geometrical isomers?