Neutrophils and lymphocytes are types of white blood cells that play a crucial role in the immune system. They both originate from the bone marrow, which is a spongy tissue found inside our bones.

Option 1, kidney tubule, is incorrect. The kidney tubule is a part of the kidney responsible for filtering waste from our blood, but it does not produce or originate any blood cells.

Option 2, spleen, is also incorrect. The spleen is an organ located in the upper left abdomen that helps filter the blood and remove old or damaged red blood cells. However, it is not involved in the production of white blood cells.

Option 4, lymph node, is also incorrect. Lymph nodes are small, bean-shaped structures found throughout the body that play a role in filtering lymph (a clear fluid that contains white blood cells) and fighting off infections. While lymph nodes contain white blood cells, they are not the site of their origin.

Therefore, the correct answer is option 3, bone marrow. The bone marrow is responsible for the production of various types of blood cells, including neutrophils and lymphocytes.