Which of the following statements relating to Age-sex pyramid is/are correct?1The age-sex pyramid of less developed countries like Nigeria is a triangular shaped pyramid with a wide base.2The age-sex pyramid of less developed countries have larger populations in lower age groups due to high birth rates.3The age sex pyramid of developed countries like Australia are age-sex pyramid is bell shaped and tapered towards the top which shows birth and death rates are almost equal leading to a near constant population..4All of the aboveAnswer & explanation+Correct answer: option 4All given options are correct.